4-4
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Connector Pin Assignments
4
Asynchronous/Synchronous serial port connectors (J7/J8)
The interface for the asynchronous/synchronous serial ports 3 and 4 is
provided by two HD-26 connectors, J7 and J8. The connector shields for
these ports are tied to chassis ground.
The pin assignments and signal mnemonics for serial ports 3 and 4 are
listed in the following tables.
Table 4-3. Serial port 3 pin assignments
Pin
Signal
Pin
Signal
1
No Connect
14
SP3_P14
2
TXD3
15
TXCI3
3
RXD3
16
SP3_P16
4
RTS3
17
RXCI3
5
CTS3
18
LLB3
6
DSR3
19
SP3_P19
7
GND
20
DTR3
8
DCD3
21
RLB3
9
SP3_P9
22
RI3
10
SP3_P10
23
SP3_P23
11
SP3_P11
24
TXCO3
12
SP3_P12
25
TM3
13
SP3_P13
26
No Connect
Table 4-4. Serial port 4 pin assignments
Pin
Signal
Pin Signal
1
No Connect
14
SP4_P14
2
TXD4
15
TXCI4
3
RXD4
16
SP4_P16
4
RTS4
17
RXCI4
5
CTS4
18
LLB4